Eco-districts in France: What tools to ensure goals achievement?

Globally, to build cities and communities more inclusive, safe, resilient and sustainable is one of the most important sustainable development goals. Eco-districts in cities emerged as an answer to current global environmental concerns and have been developed in France since the 1990s. The objective of this work is to gather operational feedback from sustainable neighborhood projects owners to better understand the key barriers of such projects and how to overcome them. A case study of the eco-district Les Tanneries, Lingolsheim showed that the carbon footprint of each inhabitant annually amounted to 4 tons CO_2 equivalent, more than half of the French average. Rooms for improvements were clearly identified regarding transports and food carbon footprint. Indicators for energy consumption, social diversity and density reached the level of the eco-districts average. A governance review pointed out some superior practices such as the formalization of a specification requirements handbook, a competition between project management teams, and the use of neighborhood sustainability assessment tools to measure and track changes in performance. The validated tools and obtained results can be useful in building sustainable cities and even China's ecological civilization.     

Biological Marker of Middle Jurassic Oil Shale Sequence From Shuanghui Area,Northern Tibetan Plateau

BIOLOGICAL MARKER OF MIDDLE JURASSIC OIL SHALE SEQUENCE FROM SHUANGHUI AREA,NORTHERN TIBETAN PLATEAU     

多金属结核粒径分形特征初步研究

通过对东太平洋中国开辟区东、西两区的多金属结核进行粒径分析,发现其粒径分布有分形特征。无缆取样结核粒径分形有着上、下限,虽然在小粒径上没有分形关系,但却存在着另一种确定的线性关系。说明东、西区结核在粒径、重量等分布上有着客观的一致性。通过分形分析得到了结核空间分布、粒径和重量分布的线性方程,对多金属结核矿藏储量和集矿机设计具有一定的意义。     

豫南高压麻粒岩中富钛角闪石类的成因和意义

作者用光学方法、电子探针分析方法、红外吸收光和Ｘ射线粉晶衍射方法对豫南高压麻粒岩中的富钛角闪石类进行了详细。结果表明这些富钛角闪石可分别属于钛角闪石类和成分的宇镁绿钙闪石的富钛角闪石类。它们系幔源偏碱生镁铁质岩类成分相当的原岩子高压麻粒岩相变质条件下再平衡后的变质残余矿物和重结晶矿物。     

铁闪锌矿中铁占位的物化条件及机制

对黄沙坪铅锌矿床内带铁门锌矿的研究表明,其形成的温度为300C土;压力大致为107Pa;fs2约为10(12.36);fo2约为10(35.14);pH值约为5．5;pco;约为7．93×104～17．86×104Pa。成矿溶液中Fe和Zn的主要存在形式有：FeCl 、FeOH 、FeCl0、Zn（HS）、ZnCl 、ZnCl以及Fe2 等。铁闪锌矿中Fe2 含量与温度和fs2关系最密切,而后者更为重要。Fe2 是在铁闪锌矿结晶过程中进入八面体位置的一这是ZnS与FeS之间构成有限固港体的根本原因。     

金矿床的定年方法述评

从金矿床复杂的成矿时代出发,仔细分析当前常用金矿床定年方法,如Ｕ－Ｐｂ法,含金矿物和矿物流体包裹体定年方法,Ｒｅ－Ｏｓ法、裂变径迹法的适用性与局限性,讨论了当今成矿时代研究中存在的问题,并建立了准确的定年步骤。     

下庄铀矿田控矿因素光-能谱融合图像解译应用研究

通过光-能谱融合图像处理、解译与部分野外验证,对下庄铀矿田发育的钾化蚀变带和低钍补体进行了识别与提取,指出铀成矿与钾化蚀变断裂带及低钍补体具有密切的成因与空间联系。另外,以能谱图像上发现的环状影像为线索,通过对岩体主体固结成岩后穹状构造隆升事件的研究,认为本区曾存在地幔柱,地幔柱作用引发了多种地质事件(或作用),这是形成铀矿田的根本原因所在     

下庄铀矿田成矿古水热系统的同位素研究及其应用

在分析下庄铀矿田成矿地质背景的基础上，对该矿田矿物和包体水的氢，氧同位素组成，岩石蚀变体系的氧同位素组成，沥青铀矿的铅同位素组成和方解石的碳同位素组成进行了较为系统的研究。     

Geochronology and geochemistry of the Heihe mafic pillow lavas in the Qinling Mountains, China

The Qinling Mountains in central China are the joint orogenic zone between the Sino-Korean (or North China) and the Yangtze craton blocks. The age and genesis of the Danfeng mafic volcanics in the north of the Shangzhou-Danfeng fault zone, i.e. the main suture zone in the Qinling orogenic belt, have been controverted for a long time because their age is closely related to the converged time of two blocks. The ages and the geochemical data of the Heihe pillow lavas for the Danfeng mafic volcanics in the Heihe River area in the Qinling orogen are reported in this paper. The obtained isochron age by the Sm-Nd isotopic data of the 13 whole-rock samples for the mafic pillow lavas is 963±130 (2σ) Ma, corresponding to I_Nd = 0.51173±16 (2σ),ɛ _Nd(T)= +6.6, MSWD0.57. However, the Rb-Sr isotopic analytical results for the same samples as the Sm-Nd whole-rock ones are disperse. For the Sm-Nd isotopic systems were interfered during the later geological functions, the Sm-Nd isochron age for the whole-rock sample (Q9511WR) and the mineral phenocrystal samples: amphiboles (Hb) and plagioclases (Plag) presents the better uncertainty, whereas isochron ages of 930 Ma and 437 Ma are given if the WR-Plag and WR-Hb are calculated respectively, and their Rb-Sr isochron age is 268±47(2σ) Ma, I_sr = 0.70475±11 (2σ), MSWD0.96. The major and trace elements for the lavas show that they were formed in the quasi-N-MORB setting.     

粤西水东单点系泊海域潮流和低频流特征

水东单点系泊海洋浮标站，设置在水东港附近，水深25m。利用波浪自记仪、ADCP流速剖面仪（座底）和CTD等，对水文（浪、流、潮、温、盐）和气象（海面风速和风向）进行综合观测，历时一年。其潮流特征为：表、中层流向出现最多的频率是：WSW。低频流出现频率最多的方向和潮流基本一致。10月～第二年4月的这7个月中，WSW出现率最高：表层平均出现频率52．1％，中层平均出现频率52．6％；而5～9月这5个月中，表层平均出现频率25．5％，中层平均出现频率21．3％。